In the past few minutes, ARIN – the non-profit that oversees the allocation of IP addresses in North America – confirmed the available pool of the 32-bit network addresses is totally depleted. Last night, the team estimated there were just 1,024 IPv4 addresses left in its pool – dregs, in other words. Now that’s all gone.

Now’s the time to move to over to IPv6, ARIN boss tells El Reg

Source: Official: North America COMPLETELY OUT of new IPv4 addresses